Just ran across this article tonight.
So I snooped around a little and it seems they run about $1,500. They have a five year expiration. If they deploy, they must be returned to the Mfg. for restoration - at owner expense...
Yeah, if you're gonna hit something you'll be glad you're in one of these things. If you never hit anything... well, you might wonder what else you could have bought.
What really caught my attention is that they are basically using these guys (Estonson Racing team) to gather input data for detecting crashes. Hmmm, I'm not so sure I'd wanna be part of that experiment.